I trust Sarah Smith and the board, page-29

In case a company in which you hold shares gets delisted, you have two options. Either you can hold on the shares and wait for relisting or exit the shares when the company gives an offer price to buyback before delisting from the stock exchange. ... Promoters can, however, pay a higher price for the share if they wish so. When  a company is delisted, its stock no longer trades on one of the major stock exchanges. In a direct sense, nothing happens to a shareholder when delisting occurs. The shareholder still owns the same percentage of the company as before, and he is free to sell the shares to any willing buyer. Information form the Internet